大约有 6,000 项符合查询结果（耗时：0.0302秒） [XML]
How do I map lists of nested objects with Dapper
...tions.
Caveat the in trick will work if you have less than 2100 lookups (Sql Server), if you have more you probably want to amend the query to select * from CourseLocations where CourseId in (select Id from Courses ... ) if that is the case you may as well yank all the results in one go using Quer...
Run a single Maven plugin execution?
...:process@executionId.
So, as long as you give your execution an id:
mvn sql:execute@specific-execution-id
uses the execution configured in your pom.
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Foreign Key naming scheme
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The standard convention in SQL Server is:
FK_ForeignKeyTable_PrimaryKeyTable
So, for example, the key between notes and tasks would be:
FK_note_task
And the key between tasks and users would be:
FK_task_user
This gives you an 'at a glance' vie...
node.js database [closed]
...m looking for a database to pair with a node.js app. I'm assuming a json/nosql db would be preferable to a relational DB [I can do without any json/sql impedance mismatch]. I'm considering:
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DbArithmeticExpression arguments must have a numeric common type
...od accepts Nullable<DateTime>.
Entity Framwork core (when used with Sql Server, maybe other db providers) supports the DateTime AddXxx functions (like AddHours). They're translated into DATEADD in SQL.
*EntityFunctions prior to Entity Framework version 6.
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Good reasons NOT to use a relational database?
...l databases? In my opinion, most applications rarely use the full power of SQL--it would be interesting to see how to build an SQL-free application.
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String concatenation does not work in SQLite
I am trying to execute a SQlite replace function, but use another field in the function.
4 Answers
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Can I return the 'id' field after a LINQ insert?
When I enter an object into the DB with Linq-to-SQL can I get the id that I just inserted without making another db call? I am assuming this is pretty easy, I just don't know how.
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Create unique constraint with null columns
...otal on top).
Aside: I advise not to use mixed case identifiers in PostgreSQL.
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WITH CHECK ADD CONSTRAINT followed by CHECK CONSTRAINT vs. ADD CONSTRAINT
I'm looking at the AdventureWorks sample database for SQL Server 2008, and I see in their creation scripts that they tend to use the following:
...